NSK MEGATORQUE M-ESB-YSB2020AB300 - VM: Velocity Integrator Mode; VO: Velocity Error over Limit; VW: Velocity Error over Limit Width; WC: Brake-On Timer

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8. Glossary of Command and Parameter
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« VM: Velocity Integrator Mode
Format : VM data
Data range : 0, and 1
Shipping set : 1
Default : 0
l Changes the velocity loop integrator control as shown below.
VM0 : Velocity loop P control.
VM1 : Velocity loop PI control.
« VO: Velocity Error Over Limit
Format : VO data
Data range : 1 to 5 461
Shipping set : 2 730
Default : Not available
l This is to set the error limit to report ‘Velocity error over’ alarm.
l Velocity error over alarm occurs when the velocity error exceeds the setting.
l The correspondence of the data to the velocity error depends on the Motor type.
data = detected velocity error [s
-1
] × (5461/3)
« VW: Velocity Error Over Limit Width
Format : VW data
Data : 0 to 1 000
Shipping set : 100
Default : 0
l This parameter sets the stability timer to report “Velocity abnormal” alarm.
l When the velocity is over the limit longer than the time set by the VW parameter (ms), the
“Velocity abnormal” alarm occurs.
« WC: Brake-on Timer
Format : WC data
Data rang/Shipping set
Motor model Data range [0.1s] Shipping set [0.1s]
YSB2020
0.3 to 30.0 0.3
YSB3040
0.3 to 30.0 0.3
YSB4080
0.5 to 30.0 0.5
YSB5120
0.8 to 30.0 0.8
Default : Not available
l The WC specifies a delay time between the start to the completion of brake-on action when
the brake sequence function is active. The unit of the data is 0.1[s]. When WC0.3 is specified,
the delay time shall be 30 [ms].
l The TS or ?WC reports the current setting.
l Refer to “7.1.10. Brake” for the brake sequence function.